Calculate your weighted grade in seconds
Add your assignment scores and weights to get your overall percentage and letter grade instantly.
Standard grading scale
The percentage-to-letter-grade scale used to convert your weighted average.
| Percentage | Letter grade | GPA |
|---|---|---|
| 97+% | A+ | 4.3 |
| 93–96% | A | 4.0 |
| 90–92% | A- | 3.7 |
| 87–89% | B+ | 3.3 |
| 83–86% | B | 3.0 |
| 80–82% | B- | 2.7 |
| 77–79% | C+ | 2.3 |
| 73–76% | C | 2.0 |
| 70–72% | C- | 1.7 |
| 67–69% | D+ | 1.3 |
| 63–66% | D | 1.0 |
| 60–62% | D- | 0.7 |
| 0–59% | F | 0.0 |
Want your own weighted grade? Use the grade calculator above.
About the grade calculator
This calculator finds your overall grade from any number of assignments, tests, or assessments — each with its own score and, optionally, its own weight. It's the same weighted average formula most course syllabi describe in a sentence like "homework is worth 20%, midterms 30%, and the final exam 50%," just handled instantly instead of by hand.
The math itself is straightforward once it's laid out: multiply each score by its weight, add those products together, then divide by the sum of the weights. If every assignment is worth the same amount, you can leave every weight at 1 and it becomes a plain average. If your syllabus assigns different percentages to different categories, enter those percentages as the weights instead, and the calculator does the rest.
One detail that trips people up is what a weight actually represents. Weight is relative, not absolute — a weight of 2 simply means that assignment counts twice as much as one with a weight of 1, regardless of whether you express weights as whole numbers (1, 2, 3), decimals (0.2, 0.3, 0.5), or percentages. As long as the weights are entered consistently relative to each other, the resulting percentage comes out the same.
Once your weighted percentage is calculated, this calculator converts it into a letter grade using a standard 13-level scale, from A+ (97% and above) down to F (below 60%), along with the typical 4.3-point GPA scale often used alongside it. Different schools and instructors sometimes use slightly different cutoffs — some skip the "+" and "-" grades entirely, others set the A cutoff at 90% instead of 93% — so it's worth checking your own syllabus if your grade sits close to a boundary.
This tool is meant for planning and double-checking, not as an official record — your school's gradebook or learning management system is always the authoritative source. But for quickly answering "what do I need on the final to keep a B+?" or checking that a professor's posted grade matches your own math, a weighted average calculator like this one is usually faster than doing it by hand.
Percentage to letter grade
Common percentages, already converted to a letter grade.
By percentage
Grade calculator questions
How weighted grades and letter grades are calculated.
How do I calculate my weighted grade?
Enter each assignment's score as a percentage, plus its weight (how much it counts toward your final grade). The calculator multiplies each score by its weight, adds them up, and divides by the total weight to get your overall percentage.
What does "weight" mean in a grade calculator?
Weight represents how much an assignment counts relative to the others — it's not an absolute number. If homework is worth 20% of your grade and exams are worth 80%, enter those as the weights (or 0.2 and 0.8), and the calculator scales everything correctly regardless of the exact numbers you use, as long as they're proportional.
What is a 75 in letter grade?
On the standard scale used here, 75% falls in the C range (73–76%), which is a plain C. A 77% would be a C+, and a 70% would be a C-.
What percentage is an A?
On the standard 13-level scale, 93% and above is an A, 90–92% is an A-, and 97% and above is an A+. Some schools use a simpler cutoff of 90% for any A, so check your syllabus if you're close to the line.
Do all assignments need a weight?
No — if you leave every weight at the default of 1, the calculator treats every assignment equally and just computes a plain average.
Can I use this to figure out what I need on a final exam?
You can estimate it by adding a row for the final with your target score, then adjusting that score up or down until the overall weighted average matches the final grade you want.
Why does my school's gradebook show a different grade?
Learning management systems sometimes drop the lowest score, round differently, or use custom weight categories instead of per-assignment weights. Use this calculator as a quick estimate, and treat your official gradebook as the source of truth.